Senator Charles Sumner’s copy, with his name (but not signature) at the head of the first page. 4 pp.
Buchanan, James. Convention with the Republic of Venezuela, For the Adjustment of Claims of Citizens of the United States on the Government of that Republic…. 1860. From Woodson Research Center, Rice University, Americas collection, 1811-1920, MS 518. http://hdl.handle.net/1911/27081.